I don't like power metal, most of this genre sounds for me soulless and powerless, with vocalists trying scare with his high tone vocal. But there are some exceptions, and Blind Guardian is on the very top of them.
@Chrilu I'm a big fan of Blind Guardian and yeah I buy their official stuff. But even if I didn't, Spotify is a very practical way to enjoy music and also support the artist legally. I didn't get your point.